[tracker] Added mfo:optional property to the enclosures

[Ivan Frade <ifrade src gnome org>]

commit 35c99d4c3289fb3e54f16f7dddabf8448f2e1dec
Author: Ivan Frade <ivan frade nokia com>
Date:   Wed Nov 25 12:59:22 2009 +0200

    Added mfo:optional property to the enclosures

 data/ontologies/41-mfo.ontology |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/data/ontologies/41-mfo.ontology b/data/ontologies/41-mfo.ontology
index acb9d5a..3aecb2d 100644
--- a/data/ontologies/41-mfo.ontology
+++ b/data/ontologies/41-mfo.ontology
@@ -100,6 +100,13 @@ mfo:localLink a rdf:Property ;
 	rdfs:range nfo:FileDataObject ;
 	nrl:maxCardinality 1 .
 
+mfo:optional a rdf:Property ;
+	rdfs:label "Optional";	
+	rdfs:comment "The enclosure is mandatory to download or only optional" ;
+	rdfs:domain mfo:Enclosure; 
+	rdfs:range xsd:boolean ;
+	nrl:maxCardinality 1 .
+
 # Settings available for all Feed Elements
 mfo:feedSettings a rdf:Property ;
 	rdfs:label "Feed element settings" ;